1. Lecturer, Faculty of Civil and Environmental Engineering, Universiti Tun Hussein Onn Malaysia, 86400 Parit Raja, Johor, Malaysia.
2. Professor, Sustainable Infrastructures, Faculty of Science, Engineering and Technology, Swinburne Univ., Hawthorn, VIC 3122, Australia.
3. Senior Lecturer, Centre of Environmental Safety and Risk Engineering, Victoria Univ., Werribee, VIC 3030, Australia (corresponding author).